Ocher

охра, Ochre or ocher is a natural clay earth pigment which is a mixture of ferric oxide and varying amounts of clay and sand. It ranges in color from yellow to deep orange or brown. It is also the name of the colors produced by this pigment, especially a light brownish-yellow. A variant of ochre containing a large amount of hematite, or dehydrated iron oxide, has a reddish tint known as "red ochre".

The word ochre is also used of clays colored with iron oxide, obtained as a by-product of tin and copper extraction.